I think kids should be able to bring in devices but I would make a rule that you are only aloud to bring in ipods ,and you are only aloud to use it if the teacher says you can.Like if he/she told you to find something online and quickly.On the other hand if the kids are not following your directions and instead playing a game or watching a video then I then I would not let any kid bring in devices.So I am in the middle of BYOD.